Merging records (with history) using an array scan.

mergies.js

// reduce with the acc at each stage.
const scan = (f, init, xs) => {
  let acc = init

  return [init, ... xs.map(
    x => acc = f(acc, x)
  )]
}

// Some methods...
const mine   = (x, y) => x
const theirs = (x, y) => y
const both   = (x, y) => [ x, y ] // We'll use as the default.
const concat = (x, y) => x.concat(y)

const scheme =
  { id:    theirs
  , name:  mine
  , likes: concat
  }

const mergeWith = scheme => (xs, ys) => {
  let result = {}

  // Assuming same structures...
  Object.keys(xs).map(
    k => result[key] =
      (scheme[k] || both)
      (xs[k], ys[k])
  )

  return result
}

const [ head, ... tail ] =
  [ { id:    1
    , name:  'borb'
    , likes: [ 'vuvuzela' ]
    }

  , { id:    3
    , name:  'robert'
    , likes: [ 'bagels' ]
    }

  , { id:    5
    , likes: [ 'clarinet' ]
    }
  ]

console.log(scan(mergeWith(scheme), head, tail))
// [ { id: 1, name: 'borb', likes: [ 'vuvuzela' ] }
// , { id: 3, name: 'borb', likes: [ 'vuvuzela', 'bagels' ] }
// , { id: 5, name: 'borb', likes: [ 'vuvuzela', 'bagels', 'clarinet' ] }
// ]